04/22/08 - Molality - Worked Example Problem
Here's a worked example of a molality calculation.
04/16/08 - Sulfur Hexafluoride Demonstrations
Sulfur hexafluoride is a non-toxic, invisible gas that you can use to perform interesting chemistry demonstrations. Breathe it in and make your voice much deeper when you talk. Pour it into a container and float an airplane or a ship on 'nothing'.
04/16/08 - Percent Composition by Mass
Here is an example of calculating concentration using percent composition by mass of a solution.
04/15/08 - Barking Dog Reaction - Chemistry Demonstration
The Barking Dog chemistry demonstration is based on an exothermic reaction between nitrous oxide or nitrogen monoxide and carbon disulfide. Ignition of the mixture results in a bright blue chemiluminescent flash, accompanied by a characteristic barking sound.
04/14/08 - Molarity Example Problem
Work through an example of calculating the molarity of a solution.
04/13/08 - Metal Jewelry Stamps & Marks
Jewelry made from precious metals often is stamped with a mark to indicate the chemical composition of the metal. These stamps or engravings are called quality marks. Here's a look at what different quality marks signify. Gold, silver, vermeil, platinum, and palladium are included.
04/13/08 - Luminol Chemiluminescence Test for Blood
You can use the luminol chemiluminescence reaction as a quick and easy forensic test for blood. Here's a look at what you need to perform the test, how to do it, and an explanation of how the luminol test works.
04/09/08 - Colored Fire Spray Bottles
You can spritz a flame with chemicals to change the color of the fire. Colored fire spray bottles are easy to prepare and use common chemicals.
04/09/08 - Black Snakes or Glow Worms
You can make black snake or glow worm fireworks yourself, safely and easily.
04/09/08 - Aqueous Solution Dilutions
Here is a worked example of how to calculate a dilution of a stock solution.
04/06/08 - List of Gemstones
This list of gemstones includes the mineral names of the gemstones as well as links to photos of the gems.
04/03/08 - Carbon Cycle
Carbon is an element that is essential for life. The carbon cycle describes the storage and exchange of carbon between the Earth's biosphere, atmosphere, hydrosphere, and geosphere.
03/29/08 - Lichtenberg Figures
Lichtenberg figures essentially capture the image of lightning. Here's how you can make your own Lichtenberg figure from common materials.
03/25/08 - Nitrogen Cycle
Learn about the processes involved in the nitrogen cycle, the biochemical cycle that describes the transformations of nitrogen as it goes through nature.
02/28/08 - How to Read a Meniscus
The meniscus is the curve seen at the top of a liquid in response to its container. When you read a scale on the side of a container with a meniscus, such as a graduated cylinder or volumetric flask, it's important that the measurement accounts for the meniscus. Here's how to read a meniscus.
02/25/08 - How to Clean Laboratory Glassware
Cleaning laboratory glassware isn't as simple as washing the dishes. Here's how to wash your glassware so that you won't ruin your chemical solution, laboratory experiment, or the glass.
02/22/08 - Glassware Gallery
Learn the names and uses of different types of chemistry laboratory glassware.
02/20/08 - Black Chemists
Black scientists, engineers, and inventors have made important contributions to the science of chemistry. Learn about black chemists and chemical engineers and their projects.
02/16/08 - Women in Chemistry
Women have made many important contributions to the fields of chemistry and chemical engineering. Here's a list of female scientists and a description of the research or invention that made them famous.
02/15/08 - Photos of Women in Chemistry
See photos of women who made contributions to the field of chemistry.
02/13/08 - Printable Chemistry Worksheets
This is a collection of chemistry worksheets in pdf format. The answers to the questions are available on separate worksheets so you can fill them out and then check your work.
02/07/08 - Gold Alloys
None of the gold used in jewelry is pure gold. Some gold isn't even 'gold'-colored (e.g., white gold). The different colors are due to the presence of other metals alloyed with the gold. This table gives common compositions of the different colors of gold.
02/04/08 - Formulas of Common Acids & Bases
Here are the names and formulas of some of the common acids and bases. Learn how to apply prefixes and suffixes to name the acids and bases.
02/03/08 - Element List by Atomic Number
Here's a list of chemical elements ordered by increasing atomic number. The names and element symbols are provided.
02/01/08 - Sulfuric Acid & Sugar Demonstration
Ordinary table sugar and sulfuric acid react to produce a growing black column. This demonstration is an example of an exothermic reaction and a dehydration reaction. It is good for discussions about the nature of carbohydrates, hydrogen bonds, and carbon properties.
02/01/08 - Do You Add Sulfuric Acid to Water or Water to Sulfuric Acid?
It's important to add sulfuric acid to water and not water to concentrated sulfuric acid. Here's an explanation of why you don't want to make a mistake and some mnemonics that might help you remember how to play it safe in the chemistry lab.
01/29/08 - Drug Photo Gallery
See the molecular structures of common drugs, including drugs of abuse. Photos of the drugs themselves are also included.
01/26/08 - Printable Periodic Tables
Download or print these periodic tables to help work chemistry problems or to predict properties of the elements.
01/26/08 - Unit Conversion Worksheets
Use these printable worksheets to practice unit conversions. These pdf questions and answers will test your understanding of metric-metric, metric-English, and temperature conversions.
